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Unformatted text preview: Sara Carlson February 9, 2007 BIOS120 113 Evolution: A Lizards Tale Summary: The Anole lizards that inhabit the islands of the Greater Antilles display some interesting evolutionary characteristics. In order to fill different ecological niches, these lizards have evolved to become spets. The interesting aspect of this evolution is that it occurred sympatrically. On the islands of Puerto Rico, Cuba, Jamaica and Hispaniola the lizards have evolved to be twig, canopy or grass spets. Jonathan Losos, the author of Evolution: A Lizards Tale , provides two hypotheses. First is that each of the spets evolved only once and then managed to inhabit the other islands, suggesting that the twig spets would be more related to each other than to the lizards on each of their own islands and same for the canopy and grass dwellers. This hypothesis was proven incorrect because the genetic differences between the spets of the different islands proved to be greater than the number of genetic differences...
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This note was uploaded on 04/08/2008 for the course BIOS 120 taught by Professor Cundall during the Fall '06 term at Lehigh University .
- Fall '06